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2 PWM in 16F876???

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verba

Joined: 17 Aug 2004
Posts: 12

2 PWM in 16F876???

Posted: Tue Aug 17, 2004 12:16 am

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In the manual and in the datasheet, specifies that 16f876 has 2 PWM (C1 and C2).
I put this in the CCS:

Code:

setup_timer_2(T2_DIV_BY_1,9,1); //4Mhz, 100 Khz PWM timer
output_high(PIN_C1); //Init Pin C1 as output
output_high(PIN_C2); //Init Pin C2 as output
setup_ccp1(CCP_PWM); //Mode PWM CPP1
setup_ccp2(CCP_PWM); //Mode PWM CPP2
set_pwm1_duty(10); //Init PWM1 (10=100%..0=0%)
set_pwm2_duty(10); //Init PWM2 (10=100%..0=0%)

Ok, this doesn�t work. Only works the PWM2 (C1) , the PWM1 (C2) is always 0.
Why? What�s is wrong? I can�t configurate the two PWM at same time?
Thank you very much

Kenny

Joined: 07 Sep 2003
Posts: 173
Location: Australia


Posted: Tue Aug 17, 2004 1:31 am

It works for me (compiler version 3.188). Your arithmetic is fine. I didn't change anything in your code. Also I tested it by sweeping the values from 0 to 10 and back to 0, all OK.

verba

Joined: 17 Aug 2004
Posts: 12

Not for me
Posted: Tue Aug 17, 2004 3:34 am

I have 3.155 Is it possible that my version doesn�t compile correctly the PWM ?

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